[spacemanaki]

It's not really a platform, but I think that's close to what the company formed around the Humble Indie Bundle is doing. I think all of their releases have been DRM free and without any other strings attached, but I actually have no idea what the terms are like for the individual game dev companies. So I think the answer is probably "yes".

[ido]

The humble bundle is anomalously well performing, but they sell a couple of dozen games per year, each in batches of 5-6 that only sell for 2 weeks.

Steam sell a couple of hundreds indie games (out of many thousands currently on the market) throughout the year.

I think the HIB is by design not a service that the average indie (or even the exceptionally good indie) can get on.